plausible, credulous, credible 的区别和用法辨析及示例例句

这组词都有“可信的”的意思,其区别是:
plausible: a.似乎有理的(可信的)。常带有怀疑的意思。
 ➤ Even though it is a plausible explanation, I am not completely convinced.  
虽然这个解释合理,但仍不可能使我完全相信。

credulous: a.轻信的,易于相信的。
 ➤ She was credulous when she listened to the salesman and bought the car for too much money.  
她很容易轻信别人,竟然听信那个销售员的话以高价买了那辆车。

credible: a.可信的,可靠的。
 ➤ That the student told the teacher a credible story that she missed classes because she was sick.  
那个学生跟老师讲了实情,她没来上课是因为她病了。